TY - JOUR TI - Tailoring the Flow of Soft Glasses by Soft Additives AU - E. Zaccarelli AU - C. Mayer AU - A. Asteriadi AU - C. N. Likos AU - F. Sciortino AU - J. Roovers AU - H. Iatrou AU - N. Hadjichristidis AU - P. Tartaglia AU - H. Löwen AU - D. Vlassopoulos JO - Physical Review and Physical Review Letters Index PY - 2005 VL - 95 TODO - 26 SP - null PB - American Physical Society (APS) SN - 0094-0003 TODO - 10.1103/physrevlett.95.268301 TODO - Glassy states; nonmonotonic, Additives; Polymers; Rheology, Glass, glass; polymer, chemical model; chemistry; computer simulation; microfluidics; phase transition; procedures; viscosity, Computer Simulation; Glass; Microfluidics; Models, Chemical; Phase Transition; Polymers; Viscosity TODO - We examine the vitrification and melting of asymmetric star polymer mixtures by combining rheological measurements with mode coupling theory. We identify two types of glassy states, a single glass, in which the small component is fluid in the glassy matrix of the big one, and a double glass, in which both components are vitrified. Addition of small-star polymers leads to melting of both glasses, and the melting curve has a nonmonotonic dependence on the star-star size ratio. The phenomenon opens new ways for externally steering the rheological behavior of soft matter systems. © 2005 The American Physical Society. ER -